Type of procedures Post-operative pulmonary complications Yes No Head and neck procedures 20 (22.7%) 64 (77.3%) Upper abdominal 11 (25%) 33 (75%) Lower abdominal 56 (23.3%) 184 (76.7%) Thoracic 1 (16.7%) 5 (83.3%) Extrimity 1(3.22%) 30 (96.8%)

Table 2: Distribution of post-operative complication by procedure type, among patients operated at Gondar University Hospital from January 1, 2013 to April 30, 2013; n=88.